BOSTON 
The longtime girlfriend of reputed mobster James "Whitey" Bulger will plead guilty to helping Bulger evade capture, but she will not testify against him at his trial, family members of people allegedly killed by Bulger said Monday after being briefed by prosecutors.

Catherine Greig, 60, was charged with conspiracy to harbor a fugitive after she was captured with Bulger in Santa Monica, Calif., in June, more than 16 years after Bulger fled Boston.

Three family members of alleged Bulger victims said prosecutors told them that they plan to add two charges against Greig - identity fraud and conspiracy to commit identity fraud - and that Greig will plead guilty to all three charges Wednesday.

Prosecutors said each of the charges carries a maximum penalty of five years in prison, but prosecutors told the families that Greig could face as little as 32 months in prison under federal sentencing guidelines.

Tom Donahue, whose father, Michael Donahue, was allegedly killed by Bulger and another man in 1982, said he was angry about what he called a "sweetheart deal" and a "slap on the wrist' for Greig.

"I'm not happy with the deal," Donahue said. "She helped keep that guy on the run. We could have had questions answered 16 years ago."

Michael Donahue's widow, Patricia Donahue, said prosecutors told the families they could not force Greig to testify against Bulger.

"They said, `We cannot make anybody do anything they don't want to do,'" she said.

Patricia Donahue and her son said prosecutors told the families they did not want to risk Greig getting acquitted at trial.

Steven Davis, whose sister, Debra Davis, was allegedly killed by Bulger, said he has mixed feelings about Greig avoiding trial.

"I mean, she's going to get what's coming to her ... it's never going to be enough. You can't bring my sister back."

Davis said the families met for a little over an hour with U.S. Attorney Carmen Ortiz and assistant U.S. attorneys.

Bulger, now 82, headed the notorious Winter Hill Gang and was also a top-echelon FBI informant who ratted out the rival New England Mafia. His former FBI handler, John Connolly Jr., was convicted for warning Bulger that he was about to be indicted, prompting him to flee Boston in late 1994.